• Overhead generated by calling clCreateBuffer

    Rafael
    Rafael

    Hi everyone,

    I'm using OpenCL on an Exynos 8890 Octacore CPU with ARM Mali-T880 MP12 GPU (Samsung S7 edge). And it is taking a high overhead when creating a buffer from the call clCreateBuffer. I'd like to know more about this issue. Is anything related…

    • Answered
    • over 3 years ago
    • Graphics and Gaming
    • Graphics and Gaming forum
  • OpenCL Mali seg faults on unmap operations

    Alexey
    Alexey

    Hi,

    I'm working an an Android image processing app which uses OpenCL on Mali GPU.

    I have a problem where I get a random seg faults on clEnqueueUnmapMemObject or a following clReleaseMemObject

    The program just seg faults and I can't catch any of the OpenCL…

    • Answered
    • over 4 years ago
    • Graphics and Gaming
    • Graphics and Gaming forum
  • What is the incompatible DDK error on Android OpenCL Mali and how do I fix it?

    Alexey
    Alexey

    I was working on an Android app which uses OpenCL on the Galaxy Note 5 which has the Mali T-760 GPU. I pulled the library from the device and got the headers from the Mali OpenCL SDK and everything worked.

    I'm trying to build and run the same app on the…

    • Answered
    • over 4 years ago
    • Graphics and Gaming
    • Graphics and Gaming forum
  • Why do i get clEnqueueMapBuffer() performance hit?

    Mikael
    Mikael

    I'm currently porting vision algorithms to OpenCL that is specifically target for the Mali T800 gpus. For this particular problem I'm running on the T-880 series.

    I have several contiguous buffers of sizes 512x512 * (1, 2 and 4).

    After the four…

    • Answered
    • over 4 years ago
    • Graphics and Gaming
    • Graphics and Gaming forum
  • OpenCL strange error codes

    Ben
    Ben

    I'm trying to run the parboil benchmark suite on a Mali-T628 using the Mali OpenCL SDK.

    I created Makefile.conf with the following values:

    OPENCL_PATH =/PATH/TO/Mali_OpenCL_SDK_V1.1.0

    OPENCL_INC_PATH = $(OPENCL_PATH)/include

    OPENCL_LIB_PATH = $(OPENCL_PATH…

    • Answered
    • over 4 years ago
    • Graphics and Gaming
    • Graphics and Gaming forum
  • Mali T628 GPU activity in Streamline

    Cao Gao
    Cao Gao

    Hi,

    I'm trying to profile GPU utilization of the Mali T628 on an Odroid-XU4 board using Streamline. When I run some graphics workloads, sometime I can see "GPU Fragment Activity", "GPU Vertex Compute" and "GPU Vertex-Tiling-Compute Activity" adds up…

    • Answered
    • over 4 years ago
    • Graphics and Gaming
    • Graphics and Gaming forum
  • Consistent Kernel Time

    Ben
    Ben

    I'm trying to run an OpenCL kernel multiple times, in sequence. When doing this I cannot get a consistent timing between the first execution and every other execution of the kernel. Each time the kernel is run I reset the kernel arguments and call clEnqueueNDRangekernel…

    • Answered
    • over 4 years ago
    • Graphics and Gaming
    • Graphics and Gaming forum
  • How best to maximize cache-write utilization for gpu-compute?

    Sean Lumly
    Sean Lumly

    What are some best practices for preventing data from being written out to RAM when structuring a compute job on the GPU that requires a small amount of data? For example, if I wanted to do 10M read/write operations on a contiguous 1024B array and finally…

    • Answered
    • over 4 years ago
    • Graphics and Gaming
    • Graphics and Gaming forum
  • The cheapest device with support of Ubuntu(or other popular Linux), OpenCL & big friendly community

    Alex
    Alex

    Hi!

    I'm looking for the cheapest devicedevice with support of Ubuntu(or other popular Linux), OpenCL,  big friendly community and below 100$

    Any advices?

    • Answered
    • over 4 years ago
    • Graphics and Gaming
    • Graphics and Gaming forum
  • Cache Coherence for BigLittle CPUs and Arm Mali T628 MP6 GPU on the odroid XU3 board

    Kiran Chandramohan
    Kiran Chandramohan

    I am using the odroid XU3 board. It has the Samsung Exynos5422 SoC. The SoC has BigLittle CPUs and the Arm Mali T628 MP6 GPU.  I would like to run the CPU and the GPU in parallel on different sections of the array that I am processing. Currently to enforce…

    • Answered
    • over 5 years ago
    • Graphics and Gaming
    • Graphics and Gaming forum
  • why Mali_OpenCL_SDK_v1.1.0 use both static library and share library

    yang
    yang

    In Mali_OpenCL_SDK_v1.1.0

    project libCommon compile to static library(./Common)

    project libOpenCL compile to share library(./lib)

    • Answered
    • over 5 years ago
    • Graphics and Gaming
    • Graphics and Gaming forum
  • why vectorized code is slower?

    전세원
    전세원

    I am trying to make my image processing program faster.

    So, i changed my  scalar code into vectorized code.

    for understanding, the purpose of program is" read right(4) and left(4) total 8 pixel of target pixel   from input buffer

    pix…
    • Answered
    • over 5 years ago
    • Graphics and Gaming
    • Graphics and Gaming forum
  • Doesn't mali support opencl 1.1 c++ wrapper?

    전세원
    전세원

    Hi I am a graduate student trying to program with opencl.

    Recently, I've bought new smartphone  equipped with mali GPU. (Galaxy S6)

    My original JNI source code is filled with C++ wrapper.

    and...   i tried to build and run my program on new devi…

    • Answered
    • over 5 years ago
    • Graphics and Gaming
    • Graphics and Gaming forum
  • OpenCL/OpenGL ES interop on Android

    Alexander Krolik
    Alexander Krolik

    Hi,

    I'm having trouble creating an OpenCL context from an OpenGL ES context on an Odroid XU3 running Android 4.4.4. The following code works fine on other non-ARM graphics hardware, but on the Mali chip the call to clCreateContextFromType fails with the…

    • Answered
    • over 5 years ago
    • Graphics and Gaming
    • Graphics and Gaming forum
  • OpenCL on Nexus 10

    Robert David
    Robert David

    Hello,

    Is it possible to use the Mali user space drivers on the Nexus 10 available at http://malideveloper.arm.com/develop-for-mali/drivers/mali-t6xx-gpu-user-space-drivers/ with stock Google firmware for OpenCL development? I don't want to change/debug…

    • Answered
    • over 5 years ago
    • Graphics and Gaming
    • Graphics and Gaming forum
  • openCL CL_OUT_OF_RESOURCES issue

    Yuval
    Yuval

    Hi,

    I'm Trying to convert a code written in Cuda to openCL and run into some trouble. My final goal is to implement the code on an Odroid XU3 board with a Mali T628 GPU.

    In order to simplify the transition and save time trying to debug openCL kernels…

    • Answered
    • stereoKernel.cl.zip
    • over 5 years ago
    • Graphics and Gaming
    • Graphics and Gaming forum
  • OpenCL for GPU and CPU on Odroid XU3

    Tomas
    Tomas

    Hi,

    I have an Odroid XU3 running Ubuntu 14.04 (big.LITTLE with A15 and A7 + Mali-T628 MP6)

    I want to program the big.LITTLE cores together with the GPU, all using OpenCL. I have read that OpenCL for Neon should make it possible to use the CPUs (both A7…

    • Answered
    • over 5 years ago
    • Graphics and Gaming
    • Graphics and Gaming forum
  • OpenCL : Can the two GPU devices in Mali-T628 work in parallel

    Kiran Chandramohan
    Kiran Chandramohan

    Hi,

    I have an Odroid XU3 board. And i am trying to program the Mali-T628 GPU on this board with OpenCL.

    With the devices example that comes with the Mali SDK, I came to understand that there are two GPU devices on the Mali-T628. One device with 4 compute…

    • Answered
    • over 5 years ago
    • Graphics and Gaming
    • Graphics and Gaming forum
  • Using OpenCL on Odroid-XU3 is slower than without OpenCL

    Heejin Park
    Heejin Park

    Hello, I'm using Odroid-XU3.
    And I installed Opencv 3.0.0-rc1 on odroid-xu3 ubuntu 14.04.

    I have two question.

    First, In procedure installing opencv, there's no opencl sdk directory option.
    I just check 'WITH_OPENCL' and etc.
    But, Using OpenCL…

    • Answered
    • over 5 years ago
    • Graphics and Gaming
    • Graphics and Gaming forum
  • Running openCV 3 with transparent API on Mali GPUs

    mans
    mans

    OpenCV 3 RC1 has been released. It has transparent api to run on CPU or GPU.

    to make openCV transparent, it uses OpenCL kernels. To run OpenCV on GPU, the GPU should have openCL 1.2 support.

    My questions are:

    1- Since Mali T6xxx support OpenCL 1.1, is there…

    • Answered
    • over 5 years ago
    • Graphics and Gaming
    • Graphics and Gaming forum
  • why it apperars an CL_EXEC_STATUS_ERROR_FOR_EVENTS_IN_WAIT_LIST error when read buffer from gpu back to host memory?

    phenix
    phenix

    Hi,

    I create an read_write buffer on device. After computing the CL kernel  I'm ready to read is back to the host, but it appears an CL_EXEC_STATUS_ERROR_FOR_EVENTS_IN_WAIT_LIST error. The documents online says:

    if the read and write operations…

    • Answered
    • over 5 years ago
    • Graphics and Gaming
    • Graphics and Gaming forum
  • How about Off-line Shader Compiler to analyze OpenCL?

    saitoh
    saitoh

    Hi,

    I'm studying OpenCL and try to kernel performance analyze with Mali Developer Guide

    (Mali-T600 Series GPU OpenCL Developer Guide - Mali Developer Center)

    But I can't understand below:  In chapter 8.1.3

      "Use the Off-line Shader Compiler…

    • Answered
    • over 5 years ago
    • Graphics and Gaming
    • Graphics and Gaming forum
  • Kernel CL_OUT_OF_RESOURCES problem

    tan414
    tan414

    Hi,

    We are developing a program based on RK3288 (Mali T764) with Opencl. We met a very strange problem.

    Our kernel has 4 workgroups with {2,64} workitems (128 x 4 in total). The input includes two 512x768 global float arrays, one 384 global float array…

    • Answered
    • over 5 years ago
    • Graphics and Gaming
    • Graphics and Gaming forum
  • Hi, I created openCL context with openGLES config , and then use clCreateFromGLTexture2D function failed, do you know why ?

    kongya
    kongya

    Hi

    In android, I created cl context from gl like this :

    cl_context_properties props[] = { CL_GL_CONTEXT_KHR, eglGetCurrentContext(), CL_EGL_DISPLAY_KHR, eglGetCurrentDisplay(), CL_CONTEXT_PLATFORM, clplatform,0);

    clCreateContext(props,1,&device,NULL,NULL…

    • Answered
    • over 5 years ago
    • Graphics and Gaming
    • Graphics and Gaming forum
  • Run OpenCL samples in Ubuntu 14.04

    Aravind
    Aravind

    Hello

    I have the Mali OpenCL SDK  and I want to run the samples in Odroid-XU3 ( Ubuntu 14.04) with Mali T-628 GPU.

    Can anyone please explain how to perform the cross-compiling?

    Thanks

    • Answered
    • over 5 years ago
    • Graphics and Gaming
    • Graphics and Gaming forum
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